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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The viscosity of water is __________ than that of mercury.

Lower
Same as
Higher
None of these

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Reynolds number is

More than 4000
Between 2000 and 4000
Less than 2000
Less than 4000

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Hydraulics and Fluid Mechanics in ME
The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H5/4
(N√Q)/H
(N√Q)/H2/3
(N√Q)/H3/4

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Hydraulics and Fluid Mechanics in ME
The upper surface of a weir over which water flows is known is

crest
nappe
sill
weir top

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Hydraulics and Fluid Mechanics in ME
The velocity of jet of water traveling out of opening in a tank filled with water is proportional to

h/2
V/T
Head of water (h)
h²

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Hydraulics and Fluid Mechanics in ME
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.577 D
0.707 D
0.423 D
0.223 D

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